about $10/liter
 https://image.nostr.build/22a006c00f14f888909a2ab3a37a2706512b043c3bb869e43a35804883437104.png buy in large computer store - not online since its liquid 

 try canola oil - risk is urs
 https://image.nostr.build/0f11f3cf98fa8f63d2a1d5472cf96d4af81d6f7d2605d2561f200d5de72bfa44.png https://image.nostr.build/0e62a1b2936cc3e9c915f174b231e02bd7ded267333ba354fb7ae6b468ace760.png https://inrayparts.com/wp-content/uploads/2019/09/Dielectric-Oil.jpg 

 Its called rape seed oil :S